What is what kind of dog is bolt?

Without more context, it's impossible to definitively say what kind of dog Bolt is. "Bolt" is a common dog name, not a breed. To know what kind of dog Bolt is, you'd need to provide more information, such as:

• A picture of Bolt: This would be the easiest way to identify the breed or breed mix.
• A description of Bolt's appearance: Size, coat color and length, ear shape, tail shape, body structure, etc.
• Bolt's parentage: Knowing if his parents were purebreds or mixed breeds would help.
• Where Bolt came from: A shelter or breeder might have records of his breed.

With more information, it might be possible to make an educated guess about Bolt's breed or breed mix.